./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:10:22,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:10:22,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:10:22,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:10:22,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:10:22,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:10:22,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:10:22,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:10:22,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:10:22,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:10:22,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:10:22,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:10:22,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:10:22,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:10:22,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:10:22,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:10:22,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:10:22,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:10:22,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:10:22,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:10:22,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:10:22,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:10:22,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:10:22,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:10:22,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:10:22,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:10:22,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:10:22,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:10:22,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:10:22,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:10:22,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:10:22,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:10:22,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:10:22,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:10:22,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:10:22,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:10:22,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:10:22,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:10:22,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:10:22,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:10:22,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:10:22,591 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:10:22,614 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:10:22,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:10:22,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:10:22,615 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:10:22,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:10:22,616 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:10:22,616 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:10:22,616 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:10:22,616 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:10:22,616 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:10:22,617 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:10:22,617 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:10:22,617 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:10:22,617 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:10:22,618 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:10:22,618 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:10:22,618 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:10:22,618 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:10:22,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:10:22,619 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:10:22,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:10:22,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:10:22,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:10:22,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:10:22,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:10:22,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:10:22,621 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:10:22,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:10:22,621 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:10:22,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:10:22,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:10:22,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:10:22,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:10:22,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:10:22,623 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:10:22,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:10:22,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:10:22,624 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:10:22,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:10:22,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:10:22,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:10:22,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd [2022-11-23 14:10:22,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:10:22,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:10:22,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:10:22,906 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:10:22,906 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:10:22,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2022-11-23 14:10:26,011 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:10:26,352 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:10:26,353 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2022-11-23 14:10:26,391 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/data/a75118c82/ce7febbc3a6c46778da4cc420a047c09/FLAGc96a82a83 [2022-11-23 14:10:26,408 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/data/a75118c82/ce7febbc3a6c46778da4cc420a047c09 [2022-11-23 14:10:26,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:10:26,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:10:26,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:10:26,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:10:26,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:10:26,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:10:26" (1/1) ... [2022-11-23 14:10:26,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@366a3410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:26, skipping insertion in model container [2022-11-23 14:10:26,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:10:26" (1/1) ... [2022-11-23 14:10:26,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:10:26,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:10:27,041 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2022-11-23 14:10:27,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:10:27,071 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:10:27,289 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2022-11-23 14:10:27,293 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:10:27,346 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:10:27,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:27 WrapperNode [2022-11-23 14:10:27,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:10:27,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:10:27,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:10:27,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:10:27,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:27" (1/1) ... [2022-11-23 14:10:27,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:27" (1/1) ... [2022-11-23 14:10:27,504 INFO L138 Inliner]: procedures = 91, calls = 346, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 863 [2022-11-23 14:10:27,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:10:27,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:10:27,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:10:27,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:10:27,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:27" (1/1) ... [2022-11-23 14:10:27,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:27" (1/1) ... [2022-11-23 14:10:27,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:27" (1/1) ... [2022-11-23 14:10:27,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:27" (1/1) ... [2022-11-23 14:10:27,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:27" (1/1) ... [2022-11-23 14:10:27,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:27" (1/1) ... [2022-11-23 14:10:27,571 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:27" (1/1) ... [2022-11-23 14:10:27,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:27" (1/1) ... [2022-11-23 14:10:27,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:10:27,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:10:27,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:10:27,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:10:27,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:27" (1/1) ... [2022-11-23 14:10:27,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:10:27,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:27,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:10:27,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:10:27,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:10:27,683 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-23 14:10:27,683 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-23 14:10:27,683 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-23 14:10:27,684 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-23 14:10:27,684 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 14:10:27,684 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 14:10:27,684 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 14:10:27,684 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 14:10:27,684 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-23 14:10:27,684 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-23 14:10:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 14:10:27,685 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 14:10:27,685 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 14:10:27,685 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 14:10:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 14:10:27,686 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 14:10:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-23 14:10:27,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-23 14:10:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 14:10:27,687 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 14:10:27,687 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 14:10:27,687 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 14:10:27,688 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 14:10:27,688 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 14:10:27,689 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-23 14:10:27,689 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-23 14:10:27,689 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 14:10:27,689 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 14:10:27,689 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-23 14:10:27,691 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-23 14:10:27,691 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 14:10:27,691 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 14:10:27,691 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2022-11-23 14:10:27,691 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2022-11-23 14:10:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 14:10:27,692 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 14:10:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 14:10:27,692 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 14:10:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 14:10:27,692 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 14:10:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:10:27,693 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-23 14:10:27,693 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-23 14:10:27,693 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 14:10:27,693 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 14:10:27,694 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 14:10:27,694 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 14:10:27,694 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 14:10:27,695 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 14:10:27,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:10:27,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:10:27,695 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 14:10:27,695 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 14:10:27,874 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:10:27,877 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:10:29,034 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:10:29,878 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:10:29,879 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 14:10:29,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:10:29 BoogieIcfgContainer [2022-11-23 14:10:29,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:10:29,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:10:29,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:10:29,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:10:29,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:10:26" (1/3) ... [2022-11-23 14:10:29,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb48093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:10:29, skipping insertion in model container [2022-11-23 14:10:29,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:27" (2/3) ... [2022-11-23 14:10:29,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb48093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:10:29, skipping insertion in model container [2022-11-23 14:10:29,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:10:29" (3/3) ... [2022-11-23 14:10:29,898 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product26.cil.c [2022-11-23 14:10:29,921 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:10:29,921 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:10:30,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:10:30,019 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@c986983, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:10:30,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:10:30,028 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2022-11-23 14:10:30,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 14:10:30,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:30,043 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:30,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:30,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:30,052 INFO L85 PathProgramCache]: Analyzing trace with hash -657220948, now seen corresponding path program 1 times [2022-11-23 14:10:30,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:30,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355910603] [2022-11-23 14:10:30,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:30,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:10:30,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:30,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355910603] [2022-11-23 14:10:30,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355910603] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:30,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614456694] [2022-11-23 14:10:30,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:30,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:30,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:30,905 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:30,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:10:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:31,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 1461 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:10:31,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:10:31,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:10:31,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614456694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:31,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:10:31,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 14:10:31,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074346296] [2022-11-23 14:10:31,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:31,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:10:31,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:31,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:10:31,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:10:31,510 INFO L87 Difference]: Start difference. First operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 14:10:31,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:31,856 INFO L93 Difference]: Finished difference Result 1095 states and 1764 transitions. [2022-11-23 14:10:31,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:10:31,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2022-11-23 14:10:31,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:31,880 INFO L225 Difference]: With dead ends: 1095 [2022-11-23 14:10:31,880 INFO L226 Difference]: Without dead ends: 707 [2022-11-23 14:10:31,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:10:31,891 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 587 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:31,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1151 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:10:31,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-11-23 14:10:32,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 695. [2022-11-23 14:10:32,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 470 states have (on average 1.5829787234042554) internal successors, (744), 505 states have internal predecessors, (744), 180 states have call successors, (180), 45 states have call predecessors, (180), 44 states have return successors, (182), 172 states have call predecessors, (182), 177 states have call successors, (182) [2022-11-23 14:10:32,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1106 transitions. [2022-11-23 14:10:32,032 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1106 transitions. Word has length 45 [2022-11-23 14:10:32,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:32,033 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 1106 transitions. [2022-11-23 14:10:32,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 14:10:32,034 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1106 transitions. [2022-11-23 14:10:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:10:32,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:32,037 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:32,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:32,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-23 14:10:32,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:32,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:32,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1847079599, now seen corresponding path program 1 times [2022-11-23 14:10:32,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:32,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333981207] [2022-11-23 14:10:32,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:32,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:32,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:32,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333981207] [2022-11-23 14:10:32,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333981207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:32,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:10:32,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:10:32,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598365152] [2022-11-23 14:10:32,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:32,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:10:32,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:32,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:10:32,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:10:32,630 INFO L87 Difference]: Start difference. First operand 695 states and 1106 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 14:10:32,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:32,986 INFO L93 Difference]: Finished difference Result 2057 states and 3312 transitions. [2022-11-23 14:10:32,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:10:32,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 46 [2022-11-23 14:10:32,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:32,999 INFO L225 Difference]: With dead ends: 2057 [2022-11-23 14:10:32,999 INFO L226 Difference]: Without dead ends: 1374 [2022-11-23 14:10:33,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:10:33,004 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 576 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:33,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1263 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:10:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2022-11-23 14:10:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1290. [2022-11-23 14:10:33,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 903 states have (on average 1.6046511627906976) internal successors, (1449), 957 states have internal predecessors, (1449), 311 states have call successors, (311), 76 states have call predecessors, (311), 75 states have return successors, (330), 286 states have call predecessors, (330), 307 states have call successors, (330) [2022-11-23 14:10:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 2090 transitions. [2022-11-23 14:10:33,174 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 2090 transitions. Word has length 46 [2022-11-23 14:10:33,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:33,174 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 2090 transitions. [2022-11-23 14:10:33,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 14:10:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 2090 transitions. [2022-11-23 14:10:33,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 14:10:33,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:33,189 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:33,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:10:33,190 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:33,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:33,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1796690915, now seen corresponding path program 1 times [2022-11-23 14:10:33,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:33,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853604793] [2022-11-23 14:10:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:33,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:33,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:33,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853604793] [2022-11-23 14:10:33,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853604793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:33,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:10:33,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:10:33,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86921583] [2022-11-23 14:10:33,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:33,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:10:33,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:33,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:10:33,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:10:33,593 INFO L87 Difference]: Start difference. First operand 1290 states and 2090 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 14:10:33,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:33,984 INFO L93 Difference]: Finished difference Result 2993 states and 4835 transitions. [2022-11-23 14:10:33,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:10:33,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 69 [2022-11-23 14:10:33,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:33,998 INFO L225 Difference]: With dead ends: 2993 [2022-11-23 14:10:33,998 INFO L226 Difference]: Without dead ends: 1715 [2022-11-23 14:10:34,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:10:34,011 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 435 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:34,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 1606 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:10:34,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-11-23 14:10:34,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1673. [2022-11-23 14:10:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1167 states have (on average 1.5569837189374465) internal successors, (1817), 1221 states have internal predecessors, (1817), 394 states have call successors, (394), 104 states have call predecessors, (394), 111 states have return successors, (472), 375 states have call predecessors, (472), 388 states have call successors, (472) [2022-11-23 14:10:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2683 transitions. [2022-11-23 14:10:34,130 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2683 transitions. Word has length 69 [2022-11-23 14:10:34,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:34,132 INFO L495 AbstractCegarLoop]: Abstraction has 1673 states and 2683 transitions. [2022-11-23 14:10:34,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 14:10:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2683 transitions. [2022-11-23 14:10:34,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 14:10:34,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:34,138 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:34,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:10:34,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:34,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:34,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1529415749, now seen corresponding path program 1 times [2022-11-23 14:10:34,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:34,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147271576] [2022-11-23 14:10:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:34,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:34,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:34,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147271576] [2022-11-23 14:10:34,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147271576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:34,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:10:34,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:10:34,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223380708] [2022-11-23 14:10:34,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:34,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:10:34,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:34,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:10:34,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:10:34,619 INFO L87 Difference]: Start difference. First operand 1673 states and 2683 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 14:10:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:35,753 INFO L93 Difference]: Finished difference Result 4466 states and 7499 transitions. [2022-11-23 14:10:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:10:35,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 70 [2022-11-23 14:10:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:35,778 INFO L225 Difference]: With dead ends: 4466 [2022-11-23 14:10:35,778 INFO L226 Difference]: Without dead ends: 2805 [2022-11-23 14:10:35,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:10:35,792 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 644 mSDsluCounter, 2532 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 3260 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:35,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 3260 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:10:35,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2022-11-23 14:10:35,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2429. [2022-11-23 14:10:35,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 1700 states have (on average 1.5488235294117647) internal successors, (2633), 1786 states have internal predecessors, (2633), 564 states have call successors, (564), 153 states have call predecessors, (564), 164 states have return successors, (735), 533 states have call predecessors, (735), 556 states have call successors, (735) [2022-11-23 14:10:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 3932 transitions. [2022-11-23 14:10:35,983 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 3932 transitions. Word has length 70 [2022-11-23 14:10:35,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:35,983 INFO L495 AbstractCegarLoop]: Abstraction has 2429 states and 3932 transitions. [2022-11-23 14:10:35,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 14:10:35,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 3932 transitions. [2022-11-23 14:10:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 14:10:35,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:35,986 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:35,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:10:35,987 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:35,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:35,987 INFO L85 PathProgramCache]: Analyzing trace with hash -589147921, now seen corresponding path program 1 times [2022-11-23 14:10:35,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:35,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985932912] [2022-11-23 14:10:35,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:35,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:10:36,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:36,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985932912] [2022-11-23 14:10:36,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985932912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:36,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169418645] [2022-11-23 14:10:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:36,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:36,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:36,291 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:36,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:10:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:36,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:10:36,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:10:36,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:10:36,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169418645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:36,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:10:36,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 14:10:36,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422601601] [2022-11-23 14:10:36,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:36,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:10:36,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:36,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:10:36,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:10:36,764 INFO L87 Difference]: Start difference. First operand 2429 states and 3932 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 14:10:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:37,247 INFO L93 Difference]: Finished difference Result 5961 states and 9966 transitions. [2022-11-23 14:10:37,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:10:37,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2022-11-23 14:10:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:37,278 INFO L225 Difference]: With dead ends: 5961 [2022-11-23 14:10:37,278 INFO L226 Difference]: Without dead ends: 3544 [2022-11-23 14:10:37,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:10:37,301 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 553 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:37,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 1138 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:10:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3544 states. [2022-11-23 14:10:37,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3544 to 3399. [2022-11-23 14:10:37,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 2393 states have (on average 1.5436690346844963) internal successors, (3694), 2523 states have internal predecessors, (3694), 772 states have call successors, (772), 210 states have call predecessors, (772), 233 states have return successors, (1044), 731 states have call predecessors, (1044), 764 states have call successors, (1044) [2022-11-23 14:10:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 5510 transitions. [2022-11-23 14:10:37,596 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 5510 transitions. Word has length 70 [2022-11-23 14:10:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:37,597 INFO L495 AbstractCegarLoop]: Abstraction has 3399 states and 5510 transitions. [2022-11-23 14:10:37,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 14:10:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 5510 transitions. [2022-11-23 14:10:37,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 14:10:37,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:37,601 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:37,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:37,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:37,815 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:37,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:37,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2145970690, now seen corresponding path program 1 times [2022-11-23 14:10:37,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:37,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375640190] [2022-11-23 14:10:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:37,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:10:38,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:38,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375640190] [2022-11-23 14:10:38,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375640190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:38,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582138576] [2022-11-23 14:10:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:38,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:38,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:38,102 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:38,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:10:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:38,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:10:38,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:10:38,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:10:38,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582138576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:38,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:10:38,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-23 14:10:38,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300013208] [2022-11-23 14:10:38,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:38,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:10:38,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:38,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:10:38,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:10:38,613 INFO L87 Difference]: Start difference. First operand 3399 states and 5510 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-23 14:10:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:39,456 INFO L93 Difference]: Finished difference Result 8797 states and 14640 transitions. [2022-11-23 14:10:39,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:10:39,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2022-11-23 14:10:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:39,503 INFO L225 Difference]: With dead ends: 8797 [2022-11-23 14:10:39,506 INFO L226 Difference]: Without dead ends: 5410 [2022-11-23 14:10:39,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:10:39,541 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 498 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:39,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1816 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:10:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5410 states. [2022-11-23 14:10:39,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5410 to 5226. [2022-11-23 14:10:39,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5226 states, 3685 states have (on average 1.5042062415196744) internal successors, (5543), 3905 states have internal predecessors, (5543), 1184 states have call successors, (1184), 336 states have call predecessors, (1184), 356 states have return successors, (1571), 1090 states have call predecessors, (1571), 1173 states have call successors, (1571) [2022-11-23 14:10:40,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5226 states to 5226 states and 8298 transitions. [2022-11-23 14:10:40,028 INFO L78 Accepts]: Start accepts. Automaton has 5226 states and 8298 transitions. Word has length 71 [2022-11-23 14:10:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:40,030 INFO L495 AbstractCegarLoop]: Abstraction has 5226 states and 8298 transitions. [2022-11-23 14:10:40,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-23 14:10:40,031 INFO L276 IsEmpty]: Start isEmpty. Operand 5226 states and 8298 transitions. [2022-11-23 14:10:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-23 14:10:40,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:40,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:40,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:40,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:40,243 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:40,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:40,244 INFO L85 PathProgramCache]: Analyzing trace with hash -420849600, now seen corresponding path program 1 times [2022-11-23 14:10:40,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:40,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391225267] [2022-11-23 14:10:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:40,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:41,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:41,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391225267] [2022-11-23 14:10:41,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391225267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:41,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337383348] [2022-11-23 14:10:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:41,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:41,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:41,057 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:41,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:10:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:41,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:10:41,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:41,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:10:41,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337383348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:41,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:10:41,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-23 14:10:41,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784167680] [2022-11-23 14:10:41,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:41,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:10:41,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:41,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:10:41,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:10:41,539 INFO L87 Difference]: Start difference. First operand 5226 states and 8298 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:10:42,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:42,277 INFO L93 Difference]: Finished difference Result 10338 states and 16814 transitions. [2022-11-23 14:10:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:10:42,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 80 [2022-11-23 14:10:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:42,333 INFO L225 Difference]: With dead ends: 10338 [2022-11-23 14:10:42,334 INFO L226 Difference]: Without dead ends: 6291 [2022-11-23 14:10:42,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:10:42,368 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 117 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:42,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1752 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:10:42,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6291 states. [2022-11-23 14:10:42,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6291 to 5256. [2022-11-23 14:10:42,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 3715 states have (on average 1.5001345895020188) internal successors, (5573), 3935 states have internal predecessors, (5573), 1184 states have call successors, (1184), 336 states have call predecessors, (1184), 356 states have return successors, (1571), 1090 states have call predecessors, (1571), 1173 states have call successors, (1571) [2022-11-23 14:10:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 8328 transitions. [2022-11-23 14:10:42,911 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 8328 transitions. Word has length 80 [2022-11-23 14:10:42,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:42,912 INFO L495 AbstractCegarLoop]: Abstraction has 5256 states and 8328 transitions. [2022-11-23 14:10:42,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:10:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 8328 transitions. [2022-11-23 14:10:42,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 14:10:42,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:42,916 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:42,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:43,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 14:10:43,124 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:43,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:43,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1190523333, now seen corresponding path program 1 times [2022-11-23 14:10:43,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:43,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736752396] [2022-11-23 14:10:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:43,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 14:10:43,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:43,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736752396] [2022-11-23 14:10:43,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736752396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:43,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605082406] [2022-11-23 14:10:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:43,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:43,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:43,818 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:43,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:10:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:44,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:10:44,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:44,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:10:44,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605082406] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:44,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:10:44,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 18 [2022-11-23 14:10:44,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861679901] [2022-11-23 14:10:44,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:44,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:10:44,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:44,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:10:44,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:10:44,888 INFO L87 Difference]: Start difference. First operand 5256 states and 8328 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-23 14:10:47,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:47,830 INFO L93 Difference]: Finished difference Result 10919 states and 17521 transitions. [2022-11-23 14:10:47,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:10:47,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 84 [2022-11-23 14:10:47,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:47,889 INFO L225 Difference]: With dead ends: 10919 [2022-11-23 14:10:47,890 INFO L226 Difference]: Without dead ends: 6860 [2022-11-23 14:10:47,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:10:47,921 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 1373 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 1899 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 2222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 1899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:47,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1457 Valid, 1937 Invalid, 2222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 1899 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 14:10:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6860 states. [2022-11-23 14:10:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6860 to 5891. [2022-11-23 14:10:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5891 states, 4170 states have (on average 1.484412470023981) internal successors, (6190), 4433 states have internal predecessors, (6190), 1312 states have call successors, (1312), 360 states have call predecessors, (1312), 408 states have return successors, (1825), 1200 states have call predecessors, (1825), 1301 states have call successors, (1825) [2022-11-23 14:10:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5891 states to 5891 states and 9327 transitions. [2022-11-23 14:10:48,586 INFO L78 Accepts]: Start accepts. Automaton has 5891 states and 9327 transitions. Word has length 84 [2022-11-23 14:10:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:48,587 INFO L495 AbstractCegarLoop]: Abstraction has 5891 states and 9327 transitions. [2022-11-23 14:10:48,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-23 14:10:48,589 INFO L276 IsEmpty]: Start isEmpty. Operand 5891 states and 9327 transitions. [2022-11-23 14:10:48,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 14:10:48,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:48,593 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:48,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:48,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 14:10:48,802 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:48,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:48,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2108083562, now seen corresponding path program 1 times [2022-11-23 14:10:48,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:48,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223478190] [2022-11-23 14:10:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:48,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:10:49,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:49,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223478190] [2022-11-23 14:10:49,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223478190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:49,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461011086] [2022-11-23 14:10:49,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:49,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:49,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:49,493 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:49,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:10:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:49,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 14:10:49,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:10:50,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:10:50,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461011086] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:50,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:10:50,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2022-11-23 14:10:50,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945346209] [2022-11-23 14:10:50,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:50,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:10:50,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:10:50,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:10:50,794 INFO L87 Difference]: Start difference. First operand 5891 states and 9327 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-23 14:10:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:56,116 INFO L93 Difference]: Finished difference Result 17211 states and 30127 transitions. [2022-11-23 14:10:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:10:56,117 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2022-11-23 14:10:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:56,216 INFO L225 Difference]: With dead ends: 17211 [2022-11-23 14:10:56,217 INFO L226 Difference]: Without dead ends: 12955 [2022-11-23 14:10:56,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 14:10:56,264 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 2682 mSDsluCounter, 2359 mSDsCounter, 0 mSdLazyCounter, 2990 mSolverCounterSat, 1281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2771 SdHoareTripleChecker+Valid, 3031 SdHoareTripleChecker+Invalid, 4271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1281 IncrementalHoareTripleChecker+Valid, 2990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:56,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2771 Valid, 3031 Invalid, 4271 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1281 Valid, 2990 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-23 14:10:56,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12955 states. [2022-11-23 14:10:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12955 to 11319. [2022-11-23 14:10:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11319 states, 8141 states have (on average 1.4921999754329935) internal successors, (12148), 8596 states have internal predecessors, (12148), 2366 states have call successors, (2366), 681 states have call predecessors, (2366), 811 states have return successors, (4153), 2201 states have call predecessors, (4153), 2349 states have call successors, (4153) [2022-11-23 14:10:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11319 states to 11319 states and 18667 transitions. [2022-11-23 14:10:57,751 INFO L78 Accepts]: Start accepts. Automaton has 11319 states and 18667 transitions. Word has length 87 [2022-11-23 14:10:57,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:57,752 INFO L495 AbstractCegarLoop]: Abstraction has 11319 states and 18667 transitions. [2022-11-23 14:10:57,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-23 14:10:57,752 INFO L276 IsEmpty]: Start isEmpty. Operand 11319 states and 18667 transitions. [2022-11-23 14:10:57,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-23 14:10:57,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:57,756 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:57,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:57,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:57,965 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:57,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:57,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1803028452, now seen corresponding path program 1 times [2022-11-23 14:10:57,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:57,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689061647] [2022-11-23 14:10:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:57,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:10:58,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:58,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689061647] [2022-11-23 14:10:58,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689061647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:58,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144448872] [2022-11-23 14:10:58,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:58,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:58,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:58,733 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:58,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:10:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:59,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1807 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:10:59,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:10:59,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:10:59,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144448872] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:59,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:10:59,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2022-11-23 14:10:59,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499741301] [2022-11-23 14:10:59,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:59,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:10:59,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:59,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:10:59,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:10:59,886 INFO L87 Difference]: Start difference. First operand 11319 states and 18667 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-23 14:11:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:03,185 INFO L93 Difference]: Finished difference Result 22566 states and 37839 transitions. [2022-11-23 14:11:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:11:03,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2022-11-23 14:11:03,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:03,309 INFO L225 Difference]: With dead ends: 22566 [2022-11-23 14:11:03,310 INFO L226 Difference]: Without dead ends: 12882 [2022-11-23 14:11:03,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 173 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:11:03,377 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 1229 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:03,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1320 Valid, 1638 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-23 14:11:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12882 states. [2022-11-23 14:11:04,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12882 to 11319. [2022-11-23 14:11:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11319 states, 8141 states have (on average 1.4921999754329935) internal successors, (12148), 8596 states have internal predecessors, (12148), 2366 states have call successors, (2366), 681 states have call predecessors, (2366), 811 states have return successors, (4141), 2201 states have call predecessors, (4141), 2349 states have call successors, (4141) [2022-11-23 14:11:04,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11319 states to 11319 states and 18655 transitions. [2022-11-23 14:11:04,963 INFO L78 Accepts]: Start accepts. Automaton has 11319 states and 18655 transitions. Word has length 91 [2022-11-23 14:11:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:04,964 INFO L495 AbstractCegarLoop]: Abstraction has 11319 states and 18655 transitions. [2022-11-23 14:11:04,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-23 14:11:04,965 INFO L276 IsEmpty]: Start isEmpty. Operand 11319 states and 18655 transitions. [2022-11-23 14:11:04,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-23 14:11:04,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:04,973 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:04,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:05,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:05,182 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:05,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:05,183 INFO L85 PathProgramCache]: Analyzing trace with hash 463867080, now seen corresponding path program 1 times [2022-11-23 14:11:05,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:05,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105673991] [2022-11-23 14:11:05,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:05,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 14:11:06,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:06,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105673991] [2022-11-23 14:11:06,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105673991] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:06,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251567865] [2022-11-23 14:11:06,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:06,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:06,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:06,310 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:06,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:11:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:06,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:11:06,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:11:06,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:06,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251567865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:06,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:11:06,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-23 14:11:06,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842918133] [2022-11-23 14:11:06,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:06,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:11:06,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:06,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:11:06,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:11:06,896 INFO L87 Difference]: Start difference. First operand 11319 states and 18655 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:11:08,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:08,258 INFO L93 Difference]: Finished difference Result 21798 states and 37277 transitions. [2022-11-23 14:11:08,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:11:08,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 111 [2022-11-23 14:11:08,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:08,350 INFO L225 Difference]: With dead ends: 21798 [2022-11-23 14:11:08,350 INFO L226 Difference]: Without dead ends: 11694 [2022-11-23 14:11:08,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:11:08,430 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 2 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:08,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2262 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:11:08,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11694 states. [2022-11-23 14:11:09,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11694 to 11541. [2022-11-23 14:11:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11541 states, 8291 states have (on average 1.483295139307683) internal successors, (12298), 8779 states have internal predecessors, (12298), 2366 states have call successors, (2366), 681 states have call predecessors, (2366), 883 states have return successors, (4623), 2240 states have call predecessors, (4623), 2349 states have call successors, (4623) [2022-11-23 14:11:09,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11541 states to 11541 states and 19287 transitions. [2022-11-23 14:11:09,481 INFO L78 Accepts]: Start accepts. Automaton has 11541 states and 19287 transitions. Word has length 111 [2022-11-23 14:11:09,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:09,482 INFO L495 AbstractCegarLoop]: Abstraction has 11541 states and 19287 transitions. [2022-11-23 14:11:09,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:11:09,482 INFO L276 IsEmpty]: Start isEmpty. Operand 11541 states and 19287 transitions. [2022-11-23 14:11:09,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 14:11:09,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:09,492 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:09,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:09,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 14:11:09,701 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:09,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:09,703 INFO L85 PathProgramCache]: Analyzing trace with hash -515708313, now seen corresponding path program 1 times [2022-11-23 14:11:09,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:09,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005620949] [2022-11-23 14:11:09,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:09,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 14:11:10,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:10,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005620949] [2022-11-23 14:11:10,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005620949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:10,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263663423] [2022-11-23 14:11:10,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:10,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:10,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:10,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:10,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:11:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:10,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 1885 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:11:10,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:11:10,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:10,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263663423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:10,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:11:10,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-23 14:11:10,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277810771] [2022-11-23 14:11:10,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:10,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:11:10,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:10,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:11:10,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:11:10,895 INFO L87 Difference]: Start difference. First operand 11541 states and 19287 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 14:11:12,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:12,244 INFO L93 Difference]: Finished difference Result 23853 states and 41402 transitions. [2022-11-23 14:11:12,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:11:12,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 122 [2022-11-23 14:11:12,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:12,340 INFO L225 Difference]: With dead ends: 23853 [2022-11-23 14:11:12,341 INFO L226 Difference]: Without dead ends: 11188 [2022-11-23 14:11:12,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:11:12,443 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 241 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:12,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 1585 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:11:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11188 states. [2022-11-23 14:11:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11188 to 11155. [2022-11-23 14:11:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 7979 states have (on average 1.452562977816769) internal successors, (11590), 8457 states have internal predecessors, (11590), 2308 states have call successors, (2308), 677 states have call predecessors, (2308), 867 states have return successors, (4424), 2180 states have call predecessors, (4424), 2291 states have call successors, (4424) [2022-11-23 14:11:13,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 18322 transitions. [2022-11-23 14:11:13,603 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 18322 transitions. Word has length 122 [2022-11-23 14:11:13,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:13,604 INFO L495 AbstractCegarLoop]: Abstraction has 11155 states and 18322 transitions. [2022-11-23 14:11:13,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 14:11:13,605 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 18322 transitions. [2022-11-23 14:11:13,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-23 14:11:13,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:13,617 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:13,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:13,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 14:11:13,832 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:13,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:13,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1314652631, now seen corresponding path program 1 times [2022-11-23 14:11:13,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:13,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823542831] [2022-11-23 14:11:13,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:13,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 14:11:14,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:14,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823542831] [2022-11-23 14:11:14,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823542831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:14,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476263490] [2022-11-23 14:11:14,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:14,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:14,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:14,840 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:14,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:11:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:15,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:11:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:11:15,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:15,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476263490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:15,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:11:15,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-23 14:11:15,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392876893] [2022-11-23 14:11:15,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:15,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:11:15,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:15,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:11:15,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:11:15,454 INFO L87 Difference]: Start difference. First operand 11155 states and 18322 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 14:11:16,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:16,980 INFO L93 Difference]: Finished difference Result 23289 states and 39619 transitions. [2022-11-23 14:11:16,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:11:16,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 126 [2022-11-23 14:11:16,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:17,078 INFO L225 Difference]: With dead ends: 23289 [2022-11-23 14:11:17,079 INFO L226 Difference]: Without dead ends: 11155 [2022-11-23 14:11:17,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:11:17,192 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 239 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:17,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1554 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:11:17,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11155 states. [2022-11-23 14:11:18,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11155 to 11155. [2022-11-23 14:11:18,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 7979 states have (on average 1.4167188870785812) internal successors, (11304), 8457 states have internal predecessors, (11304), 2308 states have call successors, (2308), 677 states have call predecessors, (2308), 867 states have return successors, (4424), 2180 states have call predecessors, (4424), 2291 states have call successors, (4424) [2022-11-23 14:11:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 18036 transitions. [2022-11-23 14:11:18,530 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 18036 transitions. Word has length 126 [2022-11-23 14:11:18,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:18,530 INFO L495 AbstractCegarLoop]: Abstraction has 11155 states and 18036 transitions. [2022-11-23 14:11:18,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 14:11:18,531 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 18036 transitions. [2022-11-23 14:11:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 14:11:18,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:18,546 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:18,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:18,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:18,755 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:18,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:18,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1739786144, now seen corresponding path program 1 times [2022-11-23 14:11:18,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:18,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162695109] [2022-11-23 14:11:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:18,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 14:11:19,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:19,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162695109] [2022-11-23 14:11:19,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162695109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:19,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960516215] [2022-11-23 14:11:19,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:19,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:19,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:19,162 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:19,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:11:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:19,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 2321 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:11:19,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:11:19,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:19,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960516215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:19,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:11:19,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-23 14:11:19,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189883332] [2022-11-23 14:11:19,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:19,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:11:19,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:19,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:11:19,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:11:19,888 INFO L87 Difference]: Start difference. First operand 11155 states and 18036 transitions. Second operand has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-23 14:11:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:24,304 INFO L93 Difference]: Finished difference Result 24266 states and 40023 transitions. [2022-11-23 14:11:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 14:11:24,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 130 [2022-11-23 14:11:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:24,427 INFO L225 Difference]: With dead ends: 24266 [2022-11-23 14:11:24,427 INFO L226 Difference]: Without dead ends: 13081 [2022-11-23 14:11:24,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:11:24,516 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 1134 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 3342 mSolverCounterSat, 475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 3817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 3342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:24,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1217 Valid, 1447 Invalid, 3817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [475 Valid, 3342 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-23 14:11:24,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13081 states. [2022-11-23 14:11:25,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13081 to 11140. [2022-11-23 14:11:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11140 states, 7964 states have (on average 1.4171270718232045) internal successors, (11286), 8442 states have internal predecessors, (11286), 2308 states have call successors, (2308), 677 states have call predecessors, (2308), 867 states have return successors, (4424), 2180 states have call predecessors, (4424), 2291 states have call successors, (4424) [2022-11-23 14:11:26,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11140 states to 11140 states and 18018 transitions. [2022-11-23 14:11:26,078 INFO L78 Accepts]: Start accepts. Automaton has 11140 states and 18018 transitions. Word has length 130 [2022-11-23 14:11:26,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:26,078 INFO L495 AbstractCegarLoop]: Abstraction has 11140 states and 18018 transitions. [2022-11-23 14:11:26,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-23 14:11:26,078 INFO L276 IsEmpty]: Start isEmpty. Operand 11140 states and 18018 transitions. [2022-11-23 14:11:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-23 14:11:26,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:26,091 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:26,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:26,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 14:11:26,301 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:26,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:26,302 INFO L85 PathProgramCache]: Analyzing trace with hash 998206594, now seen corresponding path program 1 times [2022-11-23 14:11:26,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:26,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230994944] [2022-11-23 14:11:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:26,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-23 14:11:27,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:27,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230994944] [2022-11-23 14:11:27,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230994944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:27,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792844237] [2022-11-23 14:11:27,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:27,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:27,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:27,407 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:27,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 14:11:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:27,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 2348 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:11:27,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:11:28,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:28,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792844237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:28,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:11:28,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2022-11-23 14:11:28,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245788707] [2022-11-23 14:11:28,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:28,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:11:28,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:28,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:11:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:11:28,126 INFO L87 Difference]: Start difference. First operand 11140 states and 18018 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-23 14:11:30,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:30,201 INFO L93 Difference]: Finished difference Result 26182 states and 43889 transitions. [2022-11-23 14:11:30,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:11:30,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 137 [2022-11-23 14:11:30,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:30,293 INFO L225 Difference]: With dead ends: 26182 [2022-11-23 14:11:30,294 INFO L226 Difference]: Without dead ends: 15054 [2022-11-23 14:11:30,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:11:30,376 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 462 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:30,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 1321 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:11:30,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15054 states. [2022-11-23 14:11:31,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15054 to 14738. [2022-11-23 14:11:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14738 states, 10553 states have (on average 1.4159954515303705) internal successors, (14943), 11212 states have internal predecessors, (14943), 3035 states have call successors, (3035), 873 states have call predecessors, (3035), 1149 states have return successors, (5986), 2872 states have call predecessors, (5986), 3018 states have call successors, (5986) [2022-11-23 14:11:32,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14738 states to 14738 states and 23964 transitions. [2022-11-23 14:11:32,107 INFO L78 Accepts]: Start accepts. Automaton has 14738 states and 23964 transitions. Word has length 137 [2022-11-23 14:11:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:32,108 INFO L495 AbstractCegarLoop]: Abstraction has 14738 states and 23964 transitions. [2022-11-23 14:11:32,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-23 14:11:32,109 INFO L276 IsEmpty]: Start isEmpty. Operand 14738 states and 23964 transitions. [2022-11-23 14:11:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-23 14:11:32,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:32,125 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:32,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:32,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:11:32,336 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:32,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:32,337 INFO L85 PathProgramCache]: Analyzing trace with hash 249318544, now seen corresponding path program 1 times [2022-11-23 14:11:32,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:32,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520352835] [2022-11-23 14:11:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:32,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-23 14:11:33,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:33,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520352835] [2022-11-23 14:11:33,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520352835] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:33,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173212167] [2022-11-23 14:11:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:33,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:33,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:33,273 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:33,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 14:11:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:33,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 2363 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:11:33,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:11:34,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-23 14:11:34,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173212167] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:34,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:11:34,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 7] total 19 [2022-11-23 14:11:34,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268171715] [2022-11-23 14:11:34,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:34,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:11:34,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:34,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:11:34,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:11:34,405 INFO L87 Difference]: Start difference. First operand 14738 states and 23964 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-23 14:11:40,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:40,807 INFO L93 Difference]: Finished difference Result 38197 states and 67453 transitions. [2022-11-23 14:11:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:11:40,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 142 [2022-11-23 14:11:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:40,996 INFO L225 Difference]: With dead ends: 38197 [2022-11-23 14:11:40,996 INFO L226 Difference]: Without dead ends: 25677 [2022-11-23 14:11:41,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-11-23 14:11:41,114 INFO L413 NwaCegarLoop]: 803 mSDtfsCounter, 1922 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 839 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 1887 SdHoareTripleChecker+Invalid, 3219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 839 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:41,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1992 Valid, 1887 Invalid, 3219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [839 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-23 14:11:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25677 states. [2022-11-23 14:11:43,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25677 to 22811. [2022-11-23 14:11:43,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22811 states, 16183 states have (on average 1.4181548538589879) internal successors, (22950), 17233 states have internal predecessors, (22950), 4810 states have call successors, (4810), 1445 states have call predecessors, (4810), 1817 states have return successors, (9505), 4512 states have call predecessors, (9505), 4784 states have call successors, (9505) [2022-11-23 14:11:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22811 states to 22811 states and 37265 transitions. [2022-11-23 14:11:43,783 INFO L78 Accepts]: Start accepts. Automaton has 22811 states and 37265 transitions. Word has length 142 [2022-11-23 14:11:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:43,784 INFO L495 AbstractCegarLoop]: Abstraction has 22811 states and 37265 transitions. [2022-11-23 14:11:43,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-23 14:11:43,785 INFO L276 IsEmpty]: Start isEmpty. Operand 22811 states and 37265 transitions. [2022-11-23 14:11:43,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-23 14:11:43,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:43,802 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:43,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:44,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 14:11:44,013 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:44,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:44,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1137417177, now seen corresponding path program 1 times [2022-11-23 14:11:44,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:44,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122211458] [2022-11-23 14:11:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:44,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-23 14:11:44,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:44,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122211458] [2022-11-23 14:11:44,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122211458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:44,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367898214] [2022-11-23 14:11:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:44,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:44,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:44,954 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:44,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 14:11:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:45,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 2362 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:11:45,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 14:11:45,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:45,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367898214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:45,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:11:45,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2022-11-23 14:11:45,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384293313] [2022-11-23 14:11:45,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:45,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:11:45,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:45,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:11:45,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:11:45,566 INFO L87 Difference]: Start difference. First operand 22811 states and 37265 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 14:11:48,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:48,527 INFO L93 Difference]: Finished difference Result 44525 states and 74855 transitions. [2022-11-23 14:11:48,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:11:48,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 142 [2022-11-23 14:11:48,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:48,710 INFO L225 Difference]: With dead ends: 44525 [2022-11-23 14:11:48,710 INFO L226 Difference]: Without dead ends: 23926 [2022-11-23 14:11:48,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:11:48,881 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 33 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:48,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1104 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:11:48,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23926 states. [2022-11-23 14:11:51,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23926 to 23250. [2022-11-23 14:11:51,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23250 states, 16537 states have (on average 1.4135574771724013) internal successors, (23376), 17606 states have internal predecessors, (23376), 4884 states have call successors, (4884), 1442 states have call predecessors, (4884), 1828 states have return successors, (9563), 4585 states have call predecessors, (9563), 4858 states have call successors, (9563) [2022-11-23 14:11:51,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23250 states to 23250 states and 37823 transitions. [2022-11-23 14:11:51,306 INFO L78 Accepts]: Start accepts. Automaton has 23250 states and 37823 transitions. Word has length 142 [2022-11-23 14:11:51,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:51,306 INFO L495 AbstractCegarLoop]: Abstraction has 23250 states and 37823 transitions. [2022-11-23 14:11:51,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 14:11:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 23250 states and 37823 transitions. [2022-11-23 14:11:51,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-23 14:11:51,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:51,326 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:51,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:51,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 14:11:51,542 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:51,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:51,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1024240644, now seen corresponding path program 1 times [2022-11-23 14:11:51,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:51,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852283485] [2022-11-23 14:11:51,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:51,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-23 14:11:52,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:52,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852283485] [2022-11-23 14:11:52,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852283485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:52,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873034259] [2022-11-23 14:11:52,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:52,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:52,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:52,670 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:52,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 14:11:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:53,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 2364 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:11:53,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:11:53,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:53,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873034259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:53,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:11:53,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2022-11-23 14:11:53,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451951052] [2022-11-23 14:11:53,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:53,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:11:53,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:53,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:11:53,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:11:53,456 INFO L87 Difference]: Start difference. First operand 23250 states and 37823 transitions. Second operand has 9 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-23 14:11:58,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:58,835 INFO L93 Difference]: Finished difference Result 58803 states and 97446 transitions. [2022-11-23 14:11:58,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:11:58,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) Word has length 142 [2022-11-23 14:11:58,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:59,133 INFO L225 Difference]: With dead ends: 58803 [2022-11-23 14:11:59,133 INFO L226 Difference]: Without dead ends: 37765 [2022-11-23 14:11:59,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-11-23 14:11:59,340 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 581 mSDsluCounter, 3376 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 4062 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:59,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 4062 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:11:59,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37765 states. [2022-11-23 14:12:03,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37765 to 36013. [2022-11-23 14:12:03,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36013 states, 25636 states have (on average 1.4200343267280386) internal successors, (36404), 27341 states have internal predecessors, (36404), 7567 states have call successors, (7567), 2267 states have call predecessors, (7567), 2809 states have return successors, (15577), 7024 states have call predecessors, (15577), 7523 states have call successors, (15577) [2022-11-23 14:12:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36013 states to 36013 states and 59548 transitions. [2022-11-23 14:12:03,444 INFO L78 Accepts]: Start accepts. Automaton has 36013 states and 59548 transitions. Word has length 142 [2022-11-23 14:12:03,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:03,445 INFO L495 AbstractCegarLoop]: Abstraction has 36013 states and 59548 transitions. [2022-11-23 14:12:03,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-23 14:12:03,445 INFO L276 IsEmpty]: Start isEmpty. Operand 36013 states and 59548 transitions. [2022-11-23 14:12:03,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-23 14:12:03,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:03,458 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:03,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:03,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 14:12:03,670 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:03,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:03,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1242053854, now seen corresponding path program 1 times [2022-11-23 14:12:03,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:03,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239257215] [2022-11-23 14:12:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:03,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-23 14:12:04,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:04,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239257215] [2022-11-23 14:12:04,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239257215] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:04,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925290653] [2022-11-23 14:12:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:04,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:04,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:04,784 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:04,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8de4078-971b-4fba-b2f6-23c5461d8522/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process